Pipe-coupling.



LN. GGODALL.

PIPE GOUPLING.

APFLIGATIQN z'lLBD 0012.1,1908- `Patented Jan. 3, 1911 4imrrnp sTATEsrATnNT ormoni JOHNN. GOODALL, OF PORTSMOUTH, NEW HAMPSHIRE, ASSIGNGR, BY MESNE ASSIGN- MENTS, TO GOODALL MANUFACTURING COMPANY, .A CORPORATION O E MAIN.

PIPE-COUPLING.

Specification of Letters Patent.

Patented Ja11.3, 1911.

Application led October 1, 1908. Serial No. 455,612.

To all whom 'it may concern:

Be it known that I, JOHN N. GooDALL, ot Portsmouth in the county-of Rockingham and State ot New Hampshire, have invented certain new and useful Improvements in Pipe-Couplings, of which the following is a specification.

This invention relates to pipes or conduits for various purposes and y particularly for containing electric Wires or conductors, and it has for its object to provide a construction whereby the continuity o ithe conduit may be interrupted at a given point to permit access to its interior for various purposes such as for splicing, soldering, removing or inserting Wires, cleaning out the interior of the conduit, etc.

The invention consists in the improvements which I will now proceed to describe.

and claim.

Of the accompanying drawings forming a party of this specification,-Figure. 1 represents a longitudinal section of aportion of a conduit embodying my invention. Figs. 2. 3, 4, 5, and 6 represent side elevations of v parts shown in Fig. 1.

The same reference characters indicate the same parts in all the figures.

Y I n the drawings, 10 and 11 represent adjacent pipe sections forming parts of a tubular conduit, the said sections being separated from each other by an intervening 12, 13, 14. and 15 represent tubular' am..

pling members which are adapted to make the conduit continuous between the pipe sections 10' and 11, said members being of greater diameter than the sections 10 and 11 so that they are adapted to be moved baclrward or telescoped upon said sections, means Abeing provided for detachably engaging the -of smaller diameter than the, members 14,

. and. 15 which may be termed barrel pieces.

te'rnal"scrtnv ,thread l17 which is ofgreater diameter than the thread 16 and has sub stanti'ally thcsametaper and direction. The

,tinuous position.

tail piece 12 is provided with an external tapered screw thread 18 formed to engage the smaller internal screw thread 16. The inner endV of the barrel piece 15 is provided with a tapered external screw thread '19`A adapted to engage the larger internal screw thread 17 of the barrel piece 14. The two external threads 18 and 19 are of the same direction, the internal threads 16 and 17 being of corresponding direction', and the`ar` rangement being such that, when the bn. fl piece 14 is rotated in one direction, its threads 16 and 17 will be brought into engagement with and come to a tight bearing on .the external threads 18 and 19 simultal neously. It follows therefore that, when the barrel piece 11 is rotated in the op osite di rection, its internal threads 16 and 17 will be simultaneously unscrewed from the external threads 18 and 19, so that the barrel* piece 14 Will be loosened and free tor be moved back upon the tail piece 12, thus exposing the interior'of the conduit. n

The outer end of the barrel'piece 15- is slecured to the tail piece 13 by means ora-ta-` pered linternal thread 20 in the outer end portion ofthe barrel piece 15, and a tapered external thread 21 on the corresponding end portion of the tail piece 13, the arrangement being such that when the barrel piece' 15 isV provided respectively with external tapered' screw threads 22 and 23, which have the same direction and are oppositely tapered,1 'as shown by Figs. 5 and 6, the direction of the threads 22 and 23 being the same as that -ot the threads 18, 19, and 21. ln other words,

all the external threads above referred to are of the sameV direction, cach being a right hand thread, as here shown, the severalintei-nal threads being pf. corresponding direction. 1

It will besee/n that my invention above described, provides Va simple and etfective means 'for readily opening a tubular conduit and .restoring the sameto its'closed or con- It will also be seen that 'fof bli5

an opening in the conduit may be effected by the independent rotation of either ofthe members 12, 1 3, 14, and 15, each of said members being adapted when rotated in one direction to be unscrewed simultaneously at both ends from the complemental parts and left free to be moved endwise, and when rotated in the oppositel direction to be seated simultaneously at both ends upon the said complemental parts.

As .has been stated, the members 14, 15, constitute the barrel, while the members 12 land 13 constitute tail piece members. Each tail piece member. is so formed that it may have either a sliding' ora screw thread connection with itsen'd of the barrel member, according to the location which the tail piece .member occupies longitudinally of the barrel member. The tail piece .members 12, 13 are alike, each having a smooth external portion and aninternally tapered andthreaded end to engage' a pipe section ,lO'or 11, and

also has an externally tapered and threaded end 18 or 21,'the 'diameter of each of these threaded portions'being the greatest at the d The ends of end of the tail piece member. l the barrel 1 4, 15 are'alike, each endybeing internally threaded and tapering outwardly. By tapering outwardly I mean thatthe internally threaded portions decrease in diameter toward the extreme ends of the barrel.` Of course the threaded. portions of the :tail

i piece members are tapered to.l correspond.

'and 1t is desired to gain -access to the interior the parts are inthe position shown in Fig.'1,

for any electricia'ns purpose, an lopenin 'can be effected to 'gain access to the wires wlt out disturbing either pipe section 10 or "11.

And todo this, it is not necessary tovsepay rate the two halves 14 andf15 off the barrel. Supposing it is desired to' shift the entire barrel to the left, it is onlynecessary torst rotate the tail piece member 13 in a ldirection to cause it to enter the barrel, separatingl its connection with the`pipe'11, it is then'entirely feasible to rotate' the entire barrel, and its contained tail piece 11, in a direction s o as to slide .the whole barrel to the left over the tail piece member 12'." AndA .of course 'the separationj might equallyuas ,well take place in theother direction.` Duryfing such manipulation all of .the parts ofthe 4'coupling are so held that they will not mate-1R rially contact with Wires Which may be inside of the coupling and-pipe sections.

If there are no Wires leading directly from one pipe section to the other, and it is desired to open the entirespace between the ends of the pipe sections, the whole coupling can easily be shortened or collapsed to a length that will permit it to be bodily removed lat erally without disturbing the pipe sections 10, 11. To do this, it is only necessary to actuate one or both of the tail piece members to cause it, or both of them, to be first .un screwedv from its connection-with the barrel, andv then slid inwardly. This leaves the parts in such relative positions that' they cannot become separated from each other so that one lmayjbelost during anyrepair work that is being done.

I claim: A

A pipe coupling device comprising two csf tubular members having av separable connection, each member having its outer end internally threaded to lit corresponding externally threaded members, the internal diameters ofthe unthreaded portions of the tubular eouplin members being of a size to permit said ubular members to be slid over the said externally threaded4 freel members when the threads are disengaged, whereby both members can be slipped either to the right or to the left, or one member slipped to the right and the other member tothe left, 2. A pipe coupling device comprising two tubular members having ascrew threaded connection, eachl member having its outer end internally threaded to tit corresponding externally threaded members, the internal' diameters of the Unthreaded portiorts of the tubular-coupling members being' of a size to permit said tubular members to be sli'd freely over the said externally 'threaded members when the threads are disengaged,

the threads of the members havin la direction to adapt each memberfto'. be'simultaneously seated at both ends `uponftwo comple-f mental parts by a rotation in one directlon,

'- and simultaneously detached-:at both*A ends from said direction.

3. A pipe coupling device comprising two barrel pieces and two tail pieces, the whole parts by a rotation in the'opposite constituting a coupling adapted to connect'v adjacent pipe sections and each -of larger' diameter than the-said sections," one of said barrel pieces having a smaller tapered internal. thread at its outer end portion adapted tov engage a tapered external threadon one of said :tail pieces, and a larger tapered internal thread at its-inner end of the same taper andwdirection as the -smaller thread,

'while' the other barrel piece-'Lis' engaged at its outer end with-the otherV ltailf piece and A-has a 'larger tapered"'external thread at its' inner 'end adapted to engage' the* said larger internal thread, the tail pieces being adapted for detachable engagement with the pipe seetions.

4. A pipe coupling device comprising two barrel pieces and two tail pieces, the whole constituting a coupling adapted to connect adjacent p1pesections and each of larger diameter than the said sections, one of said barrel pieces having a smaller tapered internal thread at its outer end portion adapt ed to engage a tapered external thread on one of said tail pieces, and a larger tapered internal thread at its inner end of the same direction and taper as the smaller thread, While the other eonplingjr member has a tapered internal thread at its outer end adapted to engage a tapered external thread on the other tail piece, and a larger tapered internal thread at its inner end adapted to 2 0 engage the Said larger internal thread, the

Vtail piece member, said parts having tapering threaded end connections, the diameters of both threaded connections decreasing toward the ends of the barrel.

In testimony whereof I have allixed my signature, 1n presence of two witnesses.

JOHN N. GOODALI..

lVitnesses C. FA BROWN, P. W. PEZZETTI. 

